Fig. 4: Effect of hydrophilicity and PEG chain length on solar steam evaporation based on PP-PEG-DMF evaporator.
From: Highly efficient solar steam evaporation via elastic polymer covalent organic frameworks monolith
a Water contact angles of PP-DEG-DMF foams containing different contents of CA. Digital photographs of the top-view (b), the side-view (c) and SEM images at different scales (d, e) of PP-DEG-DMF-5 wt% CA foam. f UV-Vis-NIR absorbance spectra of PP-DEG-DMF and PP-DEG-DMF-5 wt% CA in the range of 200–2200 nm. Infrared thermography images of the surface temperature of PP-DEG-DMF-5 wt% CA in dry (g) and self-contained mode (h) under 1 sun. i Surface temperature evolution of PP-DEG-DMF-5 wt% CA in the dry and self-contained mode under 1 sun. Mass changes of the bulk water, PP-DEG-DMF evaporators containing different contents of CA (j) and PP-PEG-DMF-5 wt% CA containing different lengths of flexible PEG chains (k) under 1 sun.
